Helan shan is located in the northwest of china , 37 . 0 - 3 9 . 6 n . and 105 . 3 - 106 . 8 e . . its altitude ranges from 1 600m to 3 556m . the cosmo politan genera and species of higher fungi from helan shan amount to 64 . 1 % and 1 9 . 8 % respectively . most of them are saprophytic taxa of broad physiological adap tability . the genera belonging to the boreal areal type make up 35 . 9 % , and species 52 . 7 % , which indicates that the higher fungi flora of the helan shan are dominan ted by boreal elements . no tropical genera and species have been found there . the elements of europe - asia add up to 11 . 5 % , while the elements of east asia - north america amount to 9 . 9 % which shows close relationship of fungi between the helan shan and the above two regions . the elements of china - japan amount to 3 . 1 % , whic h reflects some relations of higher fungi between china and japan . few elements e ndemic to helan shan were found but with further investigation and study , it is p ossible to find some considering its isolated geographic location and varied top ography 贺兰山高等真菌区系地理成分中,世界性分布属占64 . 1 % 、种占19 . 5 ,他们多为适应性强的腐生菌类;欧亚北美分布属占35 . 9 % 、种占52 . 7 % ,未发现热带分布的属或种,充分显示出该地区真菌以北温带分布成分为主的特点;欧亚分布种占11 . 5 % ,东亚北美分布种占9 . 9 % ,表明该地区真菌区系与欧洲、北美洲的密切联系;中国&日本分布种占3 . 1 % ,可见本地区和日本在真菌区系上也有着联系;本地区特有成分较少,但从贺兰山特殊的地理位置、相对孤立的山体和复杂的地形分析,随研究工作的深入,很可能有一些山的分布的特有成分被发现.贺兰山真菌区系成分与邻近的内蒙古大青山相比较,共有种多达57种,而与地处亚热带向热带过渡的湖南莽山相比较,共有种仅有12种,更进一步说明本地区深居北温带,真菌区系以泛北极成分为主的特色
On comparing the composition of its flora with some neighbouring floras , gmnr is most similar to lianhua mountain and dinghu mountain , the representative flora of the " southern subtropical region " . the tropical elements in gmnr flora are obviously less than those in the jianfengling flora which is the " northern tropic region " , and the temperate ones less than those in the lushan mountain flora and the jiulong mountain flora , the representative flora of the " middle subtropical region " . as shown by the coefficient of similarity of flora and the clustering analysis of geographical elements , gmnr flora has a close relationship with others in guangdong , such as the flora of lianhua mountain , dinghu mountain , qimuzhang and chebaling , and the influences of tropic elements on those flora become less and less with the latitude ' s increase 本文通过区系相似性系数比较和地理成分聚类分析，认为古兜山与莲花山、鼎湖山、七目樟和车八岭植物区系的联系都很密切，广东植物区系受热带成分的影响有从低纬向高纬、由沿海到内陆逐渐降低的趋势：古兜山植物区系受热带成分入侵最为强烈，莲花山和鼎湖山受热带成分的影响有所降低，七目樟植物区系受热带成分的影响进一步降低，车八岭植物区系受热带成分的影响最弱。
In this dissertation , the author analyzed plant biodiversity in yunmengshan forest region with field survey on plant species and forest vegetation , the results show that : the vascular plants in yunmengshan forest region include 548 species ( variation ) which belong to 319 genera , 98 families , the flora geographical composition are complex , the dominant characteristics of flora are temperate zone plants which account for 55 percent , herbaceous species occupy 75 percent exclusively . evaluating the threatened hierarchy of plants in yunmengshan forest region , the results show that the number of critically endangered species is 7 , endangered species isll , vulnerable species is 53 , lower risk species is79 , safty species 376 本文在对云蒙山林区的植物物种、植被进行调查的基础上，进行植物多样性分析，研究结果如下：云蒙山林区共有维管束植物98科319属548种和变种，地理成分复杂，包括中国全部属的15个分布区类型，区系组成以温带成分为主，占55 ；生活型谱中，草本植物种类占绝对优势，比例为75 . 3 ；通过濒危评价，得出云蒙山林区植物极危种7种，濒危种11种，渐危种53种，敏感种79种，安全种376种。
Among those species , the palaearctic species with 41 species recorded are dominant , accounting for 85 . 42 % of the total species number of the region ; the endemic species with 2 species , accounting for a comparable small part ; the widly - distributed accounting for a relatively larger proportion , with 5 species and 10 . 42 % of the total . the characteristics of the faunal construction not only reflect the adaptability of grasshopper himself to the circumstance around him but also are the appraisals and proofs of transportation about historical natural circumstances . this paper mainly aims at a - structure 从蝗虫的区系地理成分来看，长白山地区共有48种蝗虫构成了蝗虫群落，它们隶属于7科， 31属；其中古北种占有绝对优势地位，计41种，占该区蝗虫总数的85 . 42 ；东洋种所占比例较小，只有2种，占总数的4 . 17 ；广布种5种，占该区蝗虫总数的10 . 42 ；特有种所占比例较小，只有5种，占该区蝗虫总数的10 . 42 。
